import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import User from '../components/User/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'
import Cate from '../components/goods/Cate.vue'
import CategoryParams from '../components/goods/CategoryParams.vue'
import GoodsList from '../components/goods/List.vue'
import Add from '../components/goods/Add.vue'
import Order from '../components/order/Order.vue'
import Report from '../components/report/Report.vue'

Vue.use(VueRouter)

const routes = [{
  path: '/',
  redirect: '/home'
}, {
  path: '/login',
  component: Login
}, {
  path: '/home',
  component: Home,
  //   一旦登录到/home路由下，重定向到welcome
  redirect: '/welcome',
  children: [{
    path: '/welcome',
    component: Welcome
  }, {
    path: '/users',
    component: User
  }, {
    path: '/rights',
    component: Rights
  }, {
    path: '/roles',
    component: Roles
  }, {
    path: '/categories',
    component: Cate
  }, {
    path: '/params',
    component: CategoryParams
  }, {
    path: '/goods',
    component: GoodsList
  }, {
    path: '/goods/add',
    component: Add
  }, {
    path: '/orders',
    component: Order
  }, {
    path: '/reports',
    component: Report
  }]

}]

const router = new VueRouter({
  routes
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to 将要访问哪个路径，
  // from 代表从哪个路径跳转过来
  // next 是一个函数
  // next()表示放行   next('/login')强制跳转
  if (to.path === '/login') {
    return next()
  }
  const token = window.sessionStorage.getItem('token')
  if (!token) {
    return next('/login')
  }
  next()
})

export default router
